The sublimation materials Unit

Sublimation materials lab photo.

The sublimation materials unit focuses on exploring silicon carbide semiconductors, graphene, other low-dimensional materials, and their energy and environmental applications.

Sublimation materials unit focuses on exploring silicon carbide semiconductors, graphene, other low-dimensional materials, and their energy and environmental applications.

Sublimation materials Unit lab photo.The group is internationally recognized with its expertise in sublimation growth of silicon carbide (SiC) and graphene growth on SiC substrates, particularly the cubic silicon carbide (3C-SiC) growth of bulk like material with high structural quality.

The unique sublimation growth equipment in Sweden is a strong prerequisite of further technological developments. In 2011 the spin off company Graphensic AB for production of high-quality, wafer-scale graphene on SiC substrates was launched.

The group also focuses on exploring graphene, 3C-SiC, and other materials for a direct conversion of solar energy into the renewable energy such as hydrogen and other chemical fuels based on photocatalytic and photoelectrochemical (PEC) water splitting and PEC CO2 reduction. It also aims to tailor material properties for novel sensing, catalysis, and optoelectronic applications. 

Publications

2024

Hui Zeng, Jui-Che Chang, Yuanju Qu, Weimin Wang, Jens Birch, Ching-Lien Hsiao, Jianwu Sun (2024) Interface-Engineered InAlN/Cu<sub>2</sub>O Photocathode with Accelerated Charge Separation for Boosting Photoelectrochemical Water Splitting Solar RRL Continue to DOI
Daniela Gogova-Petrova, Dat Tran, Vallery Stanishev, Valdas Jokubavicius, L. Vines, M. Schubert, Rositsa Yakimova, Plamen Paskov, Vanya Darakchieva (2024) High crystalline quality homoepitaxial Si-doped β-Ga2O3(010) layers with reduced structural anisotropy grown by hot-wall MOCVD Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, Vol. 42, Article 022708 Continue to DOI
Nerijus Armakavicius, Sean Robert Knight, Philipp Kuhne, Vallery Stanishev, Dat Tran, Steffen Richter, Alexis Papamichail, Megan Stokey, Preston Sorensen, Ufuk Kilic, Mathias Schubert, Plamen Paskov, Vanya Darakchieva (2024) Electron effective mass in GaN revisited: New insights from terahertz and mid-infrared optical Hall effect APL Materials, Vol. 12, Article 021114 Continue to DOI
Sean Robert Knight, Steffen Richter, Alexis Papamichail, Megan Stokey, Rafal Korlacki, Vallery Stanishev, Philipp Kuhne, Mathias Schubert, Vanya Darakchieva (2024) Terahertz permittivity parameters of monoclinic single crystal lutetium oxyorthosilicate Applied Physics Letters, Vol. 124, Article 032101 Continue to DOI
Chaoyang Kuang, Shangzhi Chen, Min Luo, Qilun Zhang, Xiao Sun, Shaobo Han, Qingqing Wang, Vallery Stanishev, Vanya Darakchieva, Reverant Crispin, Mats Fahlman, Dan Zhao, Qiye Wen, Magnus Jonsson (2024) Switchable Broadband Terahertz Absorbers Based on Conducting Polymer-Cellulose Aerogels Advanced Science, Vol. 11, Article 2305898 Continue to DOI

2023

Sean Robert Knight, Steffen Richter, Alexis Papamichail, Philipp Kuhne, Nerijus Armakavicius, Shiqi Guo, Axel R. Persson, Vallery Stanishev, Viktor Rindert, Per O. Å. Persson, Plamen P. Paskov, Mathias Schubert, Vanya Darakchieva (2023) Room temperature two-dimensional electron gas scattering time, effective mass, and mobility parameters in AlxGa1−xN/GaN heterostructures (0.07 ≤ x ≤ 0.42) Journal of Applied Physics, Vol. 134, Article 185701 Continue to DOI
Alexis Papamichail, Axel Persson, Steffen Richter, Philipp Kuhne, Vallery Stanishev, Per O A Persson, R. Ferrand-Drake Del Castillo, M. Thorsell, H. Hjelmgren, Plamen Paskov, N. Rorsman, Vanya Darakchieva (2023) Tuning composition in graded AlGaN channel HEMTs toward improved linearity for low-noise radio-frequency amplifiers Applied Physics Letters, Vol. 122, Article 153501 Continue to DOI
Ivan Shtepliuk, Rositsa Yakimova (2023) Substrate mediated properties of gold monolayers on SiC RSC Advances, Vol. 13, p. 1125-1136 Continue to DOI
Naveen Shetty, Hans He, Richa Mitra, Johanna Huhtasaari, Konstantina Iordanidou, Julia Wiktor, Sergey Kubatkin, Saroj P. Dash, Rositsa Yakimova, Lunjie Zeng, Eva Olsson, Samuel Lara-Avila (2023) Scalable Fabrication of Edge Contacts to 2D Materials: Implications for Quantum Resistance Metrology and 2D Electronics ACS Applied Nano Materials, Vol. 6, p. 6292-6298 Continue to DOI
Ivan Shtepliuk, Rositsa Yakimova (2023) Nature of photoexcited states in ZnO-embedded graphene quantum dots Physical Chemistry, Chemical Physics - PCCP, Vol. 25, p. 10525-10535 Continue to DOI

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